#include <bits/stdc++.h>

using namespace std;

int s,x;
double dist = 0, a = 7;
int main()
{
    cin>>s>>x;
    while(dist<=s+x){
        if(dist>=s-x&&dist+a<=s+x){
            cout<<'y';
            return 0;
        }
        dist+=a;
        a*=0.98;
    }
    cout<<'n';
    return 0;
}
